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Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Current    
Federal $ 0 $ 0
State 5 14
Total current 5 14
Deferred expense    
Federal 0 (117)
State (22) 22
Total deferred (22) (95)
Total income tax benefit $ (17) $ (81)